1-55058181-C-T

Variant names:

Variant summary

Our verdict is Benign. Variant got -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BS1BS2

The NM_174936.4(PCSK9):c.1326C>T(p.Ala442Ala) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00151 in 1,613,342 control chromosomes in the GnomAD database, including 29 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0079 ( 15 hom., cov: 33)

Exomes 𝑓: 0.00084 ( 14 hom. )

Consequence

PCSK9
NM_174936.4 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:11

Conservation

PhyloP100: -0.393

Variant links:

Genes affected

PCSK9 (HGNC:20001): (proprotein convertase subtilisin/kexin type 9) This gene encodes a member of the subtilisin-like proprotein convertase family, which includes proteases that process protein and peptide precursors trafficking through regulated or constitutive branches of the secretory pathway. The encoded protein undergoes an autocatalytic processing event with its prosegment in the ER and is constitutively secreted as an inactive protease into the extracellular matrix and trans-Golgi network. It is expressed in liver, intestine and kidney tissues and escorts specific receptors for lysosomal degradation. It plays a role in cholesterol and fatty acid metabolism. Mutations in this gene have been associated with autosomal dominant familial hypercholesterolemia. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Feb 2014]

PCSK9 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -21 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.52).

BP6

Variant 1-55058181-C-T is Benign according to our data. Variant chr1-55058181-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 297701.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr1-55058181-C-T is described in Lovd as [Benign].

BP7

Synonymous conserved (PhyloP=-0.393 with no splicing effect.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00794 (1210/152320) while in subpopulation AFR AF= 0.028 (1162/41564). AF 95% confidence interval is 0.0266. There are 15 homozygotes in gnomad4. There are 563 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.

BS2

High AC in GnomAd4 at 1210 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PCSK9	NM_174936.4 link	c.1326C>T	p.Ala442Ala	synonymous_variant	Exon 8 of 12	ENST00000302118.5	NP_777596.2	Q8NBP7-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PCSK9	ENST00000302118.5 link	c.1326C>T	p.Ala442Ala	synonymous_variant	Exon 8 of 12	1	NM_174936.4	ENSP00000303208.5		Q8NBP7-1

Frequencies

GnomAD3 genomes

AF:

0.00795

AC:

1210

AN:

152202

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0280

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00170

Gnomad ASJ

AF:

0.000288

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.000147

Gnomad OTH

AF:

0.00478

GnomAD3 exomes

AF:

0.00217

AC:

542

AN:

249870

Hom.:

AF XY:

0.00165

AC XY:

224

AN XY:

135450

show subpopulations

Gnomad AFR exome

AF:

0.0274

Gnomad AMR exome

AF:

0.00145

Gnomad ASJ exome

AF:

0.000598

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000338

Gnomad OTH exome

AF:

0.00148

GnomAD4 exome

AF:

0.000839

AC:

1226

AN:

1461022

Hom.:

Cov.:

AF XY:

0.000706

AC XY:

513

AN XY:

726832

show subpopulations

Gnomad4 AFR exome

AF:

0.0282

Gnomad4 AMR exome

AF:

0.00163

Gnomad4 ASJ exome

AF:

0.000536

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000464

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000737

Gnomad4 OTH exome

AF:

0.00166

GnomAD4 genome

AF:

0.00794

AC:

1210

AN:

152320

Hom.:

Cov.:

AF XY:

0.00756

AC XY:

563

AN XY:

74470

show subpopulations

Gnomad4 AFR

AF:

0.0280

Gnomad4 AMR

AF:

0.00170

Gnomad4 ASJ

AF:

0.000288

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000147

Gnomad4 OTH

AF:

0.00473

Alfa

AF:

0.00433

Hom.:

Bravo

AF:

0.00884

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.0000545

EpiControl

AF:

0.000356

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:11

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:4

Jan 09, 2023

Quest Diagnostics Nichols Institute San Juan Capistrano

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Apr 30, 2018

GeneDx

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

May 06, 2024

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Breakthrough Genomics, Breakthrough Genomics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: not provided

- -

Hypercholesterolemia, autosomal dominant, 3

Benign:3

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. -

Jan 27, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Feb 05, 2024

All of Us Research Program, National Institutes of Health

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Hypercholesterolemia, familial, 1

Benign:2

Jan 02, 2018

Robarts Research Institute, Western University

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jun 02, 2017

Color Diagnostics, LLC DBA Color Health

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Hypobetalipoproteinemia

Benign:1

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Cardiovascular phenotype

Benign:1

Sep 29, 2014

Ambry Genetics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.52

CADD

Benign

DANN

Benign

0.54

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over